I also thought it was a shame that you can't do the four lessons (Potions, Transfiguration, Charms and Herbology) and get a grade like you could in OotP. The graphics are really great in my opinion and I enjoyed the lack of loading screens and being able to explore Hogwarts - although I thought a point was made about being able to walk all around Hogwarts, this is not entirely true as not all of the floors are in the game whereas I believe they were in the Order of the Phoenix (OotP) Game, and I couldn't find the Divination classroom although Harry doesn't take the subject so it isn't really necessary in the game, but it would have been nice to visit. I found most things to be too easy (I only replayed a duel once, only replayed flying twice) but there is always the option of going back to a club later and improving your score.
The trouble is that the storyline only took me about 7 hours to complete, and while there are other things to do (collect badges for flying/duelling/potion-making, collect all the Hogwarts crests) I am disappointed that it isn't longer because I have almost finished it after about three or four days on it.
